JPH0646661Y2 - Blow molded housing panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a blow-molded housing panel that constitutes a housing for various electronic devices, cabinets, racks, lockers, furniture such as wagons, and indoor accessories. It is about.

[Prior Art] In a housing panel formed by blow molding a thermoplastic material into a hollow double-wall structure, a thick part is formed near a parting line formed at a pinch-off portion of a mold during blow molding. However, the thickness of the peripheral edge other than that is thin because it has a high blow ratio, so if the parting line is located on one of the conventional front peripheral edge or back peripheral edge, the other peripheral edge is the other. However, in the case where the parting line is located at the middle line of the peripheral end wall, both peripheral end edges become thin and the strength of the peripheral end wall of the panel is particularly poor, and the strength and rigidity of the entire panel may be impaired. Was known.

[Problems to be solved by the invention] By the way, in this type of housing panel, since the peripheral end wall portion is fixed to another mounting portion, the peripheral end wall is inferior in strength as in the conventional housing panel. Then, it is not possible to construct a highly robust housing.

Therefore, the technical problem of the present invention is to solve the above-mentioned problems in the conventional one, and for that purpose, the parting line formed by the pinch-off portion of the mold is surrounded by the mounting member of the peripheral end wall. Since it is formed by bending it to one side, only one peripheral edge of the panel is prevented from becoming uneven and thin, and especially the strength around the mounting member is increased, so that the blow molding is excellent in mounting strength and rigidity. The purpose is to provide a housing panel made of metal.

[Means for Solving the Problems] The present invention is configured as follows as technical means for achieving the above object.

That is, the structure is a housing panel that is formed by blow molding a thermoplastic material into a hollow double-wall structure, and a mounting member is attached to a peripheral end wall that connects a front wall and a back wall, and at the time of blow molding the panel. The blow molding housing panel is characterized in that a parting line formed by a pinch-off portion of a mold is bent and formed so as to surround the mounting member.

[Operation] In the blow-molded housing panel according to the present invention, the parting line formed by the pinch-off portion of the mold is bent so as to surround the attachment member of the peripheral end wall, and the parting line portion is thick. Since it is meat, the mounting strength of the peripheral end wall is increased. Therefore, the housing panel can be used to form a highly robust housing.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

A cabinet is illustrated in FIG. The side wall 2 of the cabinet 1 is a blow-molded housing panel according to the present invention, 4 is a front door, 5 is a top plate, and 6 is a bottom plate. The housing panel is constructed as shown in FIGS.

2 to 4, 7 is a front wall, 8 is a back wall, and the front wall 7 and the back wall 8 are connected by a peripheral end wall 9 to form a housing panel 10 having a hollow double wall structure. .
A mounting member 11 is attached to the upper end surface of the peripheral end wall 9 of the housing panel 10, and a parting line 12 formed on the peripheral end wall 9 during blow molding surrounds the mounting member 11 and the front side periphery of the panel. The edge and the back side peripheral edge are bent and formed alternately. And parting line
The portion 12 is thick during blow molding, and the peripheral edges other than the parting line 12 are thin due to the high blow ratio, but the thin portion 13 is formed so as to have an inverse relationship with the parting line 12. Therefore, the strength of the portion of the peripheral end wall 9 to which the mounting member 11 is attached becomes sufficiently high.

Housing panel 10 that constitutes side wall 2 of cabinet 1
The top plate 5 is fixed by screwing a nut 15 into the mounting member 11 in the recess 14 formed in the top plate 5. 16 is a cap.

The mounting member 11 is mounted after blow molding, but it may be integrally inserted during blow molding. Parting lines 12 formed alternately on the front side peripheral edge and the back side peripheral edge of the panel so as to surround the mounting member 11,
In addition to enclosing three sides as in the embodiment, it is possible to enclose two sides, and it is possible to set an appropriate state as long as the condition is satisfied.

5 and 6 show a blow molding mode of the housing panel 10 corresponding to the cross section taken along the line CC of FIG.

FIG. 5 shows a mold clamping progress state, and FIG. 6 shows a state of blow molding after completion of the mold clamping. Reference numerals 17 and 18 are a pair of molds, 19 and 20 are cavities thereof, and 21 and 22 are pinch-off portions. A parison 2 placed between the extrusion die and the mold 17, 18 during blow molding
Although 3 is blown after mold clamping, the parting line 12 is formed in the pinch-off portions 21 and 22 formed by bending. The peripheral edges other than the above are thin portions 13 because the blow ratio is high. The parting line 12 is pinched off by the front side parison and the back side parison.
Since they are joined by 1,22, they are formed thicker than other parts. The pinch-off portions 21 and 22 of the molds 17 and 18 are configured such that the parting line 12 surrounds the mounting member 11 of the peripheral end wall 9 and is alternately formed on the front peripheral edge and the back peripheral edge of the panel. It is what In FIG. 5, the state indicated by the chain line 23a of the parison 23 is a mode at the forward position in the arrow direction of the AA line cross-sectional position. Further, in FIG. 6, 12a is a thick portion corresponding to the parting line 12 at the AA line sectional position.

As the thermoplastic material forming the housing panel 10, styrene-modified polyphenylene oxide, ABS resin, polycarbonate, polyamide, polybutylene terephthalate, polypropylene, polyethylene or the like is used.

The housing panel 10 configured as described above is used in the mold 1
The parting line 12 formed by the pinch-off portions 21, 22 of 7, 18 is formed so as to surround the mounting member 11 of the peripheral end wall 9, and is alternately formed on the front peripheral edge and the rear peripheral edge of the panel. Since the portion 12 is thick, the mounting strength of the peripheral end wall 9 is high. Therefore, the housing panel 10 can be used to form a highly robust housing.

[Advantages of the Invention] As described above, the present invention is a housing panel having a hollow double-wall structure formed by blow molding a thermoplastic material, wherein a mounting member is attached to a peripheral end wall connecting a front wall and a back wall. When the panel is blow-molded, the parting line formed at the pinch-off part of the mold is bent so as to surround the above-mentioned mounting member, so that only one peripheral edge of the panel is formed. It is possible to obtain a blow-molded housing panel excellent in mounting strength and rigidity, while preventing unevenness in thickness and increasing the strength particularly around the mounting member.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a cabinet formed by using a blow molded housing panel according to the present invention, and FIG. 2 is a partially broken perspective view showing an embodiment of a blow molded housing panel according to the present invention. Figures and 3 are in Figure 2.
AA line sectional view, FIG. 4 is a sectional view taken along the line BB of the same as above, and FIGS. 5 and 6 are sectional views showing a blow structure of a housing panel according to the present invention, corresponding to the sectional view taken along line CC of FIG. FIG. 5 shows a state where the mold clamping is in progress, and FIG. 6 shows a state where the blow molding is completed after the mold clamping. 7: front wall, 8: back wall, 9: peripheral wall, 10: housing panel, 11: mounting member, 12: parting line, 13: thin portion, 17,18: pair of Mold, 19,20 ……
The cavity, 21,22 …… Pinch off part, 23 …… Parisson

Claims (1)

[Scope of utility model registration request] 1. A housing panel formed by blow molding a thermoplastic material into a hollow double-walled structure, wherein a mounting member is mounted on a peripheral end wall connecting a front wall and a back wall, and at the time of blow molding of the panel, A blow-molded housing panel, characterized in that a parting line formed at a pinch-off portion of a mold is bent so as to surround the mounting member.